TWI697565B - Method for recovering gold-containing titanium-aluminum sputtering derived resources - Google Patents

Abstract

The invention relates to a method for recovering resources derived from gold, titanium, and aluminum sputtering, which provides the recovery of metal resources such as gold, titanium, aluminum, etc., and includes: a step of recovering aluminum, in which a resource is placed in 20-30 After being immersed in sodium hydroxide impregnant at ℃ for 15-25 minutes, filtered to obtain an aluminum-containing impregnating solution and a gold and titanium-containing filter residue. After the aluminum-containing impregnating solution is adjusted and precipitated by pH, hydrogen is obtained. Alumina recovery; a gold recovery step involves putting the aforementioned gold and titanium filter residue into a nitric acid impregnant at 60-80°C, and immersing for 3 to 5 hours, and then filtering to obtain a high-purity gold recovery and a titanium-containing Impregnating solution; a step of recovering titanium, after the titanium-containing impregnating solution undergoes pH adjustment and precipitation, the recovered titanium hydroxide is obtained.

Description

Recovery method of resources derived from gold-containing titanium-aluminum sputtering

The invention relates to a gold-containing waste recycling technology, in particular to the technical category of recycling resources derived from gold, titanium, and aluminum sputtering.

Modern times are facing a shortage of metal resources and the price of gold remains high. How to recover high-purity gold from process derivatives for industrial use and to develop modern alchemy can not only solve the environmental pollution of municipal waste, but also create resource regeneration output value .

According to, general physical vapor deposition (PVD), also known as vacuum sputtering, is to coat various metal materials on water hardware, bicycle components, 3C products, and boutique products by sputtering, and obtain excellent results. In other words, the sputtering process will produce "resources derived from gold, titanium, and aluminum sputtering", which has recycling value.

For this reason, the inventors worked hard to develop a recovery method for sputter-derived resources containing gold, titanium, and aluminum. Therefore, the purpose of the present invention is to provide a recovery method that can simultaneously recover gold, titanium, and aluminum sputter-derived resources. ; Therefore, another objective of the present invention is to provide a method for recycling sputtering-derived resources containing gold, titanium, and aluminum with a simplified recycling process and high safety.

To achieve the above objective, the present invention uses the following technical means: Regarding a recovery method for sputtering derived resources containing gold, titanium, and aluminum, it includes: a step of recovering aluminum, which is to place a resource at 20-30°C After being immersed in sodium hydroxide (NaOH) impregnant for 15-25 minutes, filtered to obtain an aluminum-containing impregnating solution and a filter residue containing gold and titanium, and then the aluminum-containing impregnating solution is adjusted and precipitated by pH adjustment. Obtain aluminum hydroxide Al(OH) ₃ recovery; a gold recovery step is to put the aforementioned gold and titanium filter residue into a nitric acid (HNO ₃ ) impregnant at 60~80℃, and immerse for 3~5 hours, then filter A high-purity gold recovery product and a titanium-containing impregnation solution are obtained; a titanium recovery step is to obtain titanium hydroxide Ti(OH) ₄ recovery product after the titanium-containing impregnation solution undergoes pH adjustment and precipitation.

In the method for recovering resources derived from sputtering containing gold, titanium, and aluminum, a crushing treatment step is performed before the aluminum recovery step.

In the recovery method of sputtering derived resources containing gold, titanium and aluminum, the concentration of the sodium hydroxide impregnant used in the aluminum recovery step is set to 5N-6N, and the impregnation solid-liquid ratio condition is set to 3g/100ml, However, the impregnant concentration, impregnation solid-liquid ratio, and impregnation time can be matched in many ways, which are not absolute.

In the method for recovering resources derived from sputtering containing gold, titanium, and aluminum, the pH adjustment and precipitation method in the aluminum recovery step is to adjust the acid-base value of the aluminum-containing impregnation solution to pH 7 with a hydrochloric acid (HCl) solution.

In the method for recovering gold, titanium, and aluminum sputtering-derived resources, the concentration of the nitric acid (HNO ₃ ) impregnant used in the gold recovery step is set to 5N-6N, and the impregnation solid-to-liquid ratio condition is set to 1g/ 100ml, but the impregnant concentration, impregnation solid-liquid ratio and impregnation time can be matched in many ways, which is not absolute.

The method for recovering resources derived from gold, titanium, and aluminum sputtering, wherein the pH adjustment precipitation method in the step of recovering titanium is to adjust the acid-base value of the titanium-containing impregnating solution to pH 7 with sodium hydroxide (NaOH) solution .

The present invention uses the above technical means to achieve the following effects:

1. The proportion of valuable metals in each piece of gold, titanium, and aluminum sputtering derived resources is about 30% gold, 10% titanium, and 60% aluminum. The use of the recycling technology of the present invention can achieve complete recycling with zero waste; the current market price of gold per kilogram 1.4 million yuan, the market price of titanium is 220 yuan per kilogram, and the market price of aluminum is 60 yuan per kilogram. On the one hand, valuable metals can be used again and increase economic benefits.

2. The recovery method of the present invention is simplified, the operating conditions of each step of the process are simple, the recovery cost can be reduced, and the corrosive aqua regia is not used, and the aluminum and titanium are recovered and removed by the wet metallurgical chain method. Highly dangerous chemicals to dissolve gold are environmentally friendly green technologies.

A: Recovery method of sputtering derived resources containing gold, titanium and aluminum

a, b, c, d: steps

Figure 1: Step flow chart of the recovery method of sputtering derived resources containing gold, titanium, and aluminum according to the present invention.

Figure 2: A schematic flow diagram of specific and preferred operating conditions of the method of the present invention.

The present invention relates to a recovery method A for sputtering-derived resources containing gold, titanium, and aluminum. As shown in Figures 1 and 2, it provides sheet-shaped waste resources generated in the sputtering chamber in the process of sputtering PVD surface coating. For the recycling of materials, usually the proportion of valuable metals in each piece of derived resource materials is about 30% of gold, 10% of titanium, and 60% of aluminum. The use of the recycling technology of the present invention can achieve complete recycling with zero waste, and the recycling method of the present invention includes : A crushing treatment step a, a recycling aluminum step b, a gold recycling step c, and a titanium recycling step d.

The crushing treatment step a is for the sputtering-derived resource material to use a crushing method to facilitate a larger contact area with each metal immersion liquid.

In the step b of recovering aluminum, a resource is put into a 5N~6N sodium hydroxide (NaOH) impregnant at 20~30℃, while the impregnation solid-liquid ratio is set to 3g/100ml, and 15 ~25 minutes later, filtered to obtain an aluminum-containing impregnation solution and a gold and titanium-containing filter residue, and then after pH adjustment and precipitation of the aluminum-containing impregnation solution, the recovered aluminum hydroxide Al(OH) ₃ is obtained. The adjustment of the precipitation method is to adjust the acid-base value of the aluminum-containing immersion solution to pH 7 with hydrochloric acid (HCl) solution. As shown in Figure 2, the optimal operating conditions for this step are set to use a 6N sodium hydroxide impregnant at 25°C and impregnate for 20 minutes; in particular, the concentration of the impregnant and the impregnating solid in step b of recovering aluminum Conditions such as liquid ratio and immersion time can be matched in many ways, which are not absolute.

小時後，過濾而得高純度金回收物及一含鈦浸漬液。如圖2所示，其中該步驟的較佳操作條件設為使用70℃的6N硝酸浸漬劑，且浸漬4小時；特別一提，該回收金步驟c中所述浸漬劑濃度、浸漬固液比及浸漬時間等條件，均可以有多種搭配方式，並非為絕對。 The gold recovery step c is to put the aforementioned gold and titanium filter residue into a 5N-6N nitric acid (HNO ₃ ) impregnant at 60-80°C, and at the same time set the impregnation solid-liquid ratio condition to 1g/100ml, and impregnate

After hours, filtered to obtain high-purity gold recovery and a titanium-containing impregnation solution. As shown in Figure 2, the optimal operating conditions for this step are set to use a 6N nitric acid impregnant at 70°C and impregnate for 4 hours; in particular, the impregnant concentration and impregnation solid-liquid ratio in the gold recovery step c Conditions such as immersion time, etc., can be matched in many ways, not absolute.

In the step d of recovering titanium, the titanium-containing impregnating solution undergoes pH adjustment and precipitation to obtain the recovered titanium hydroxide. The pH adjustment precipitation method is to adjust the titanium-containing impregnating solution with sodium hydroxide (NaOH) solution. The pH is up to pH7.

The process of the above steps constitutes the recovery method of the sputtering-derived resources containing gold, titanium, and aluminum in the present invention. Firstly, it is crushed to facilitate a larger contact area with the metal immersion liquid, and then 5N~6N is used for hydrogenation. Sodium impregnant, solid-to-liquid ratio 3g/100ml (immersion sample 3g immersion volume 100ml), immersed at 20~30℃ for 15~25 minutes, can sputter 100% aluminum in derived resources of metals containing gold, titanium and aluminum The metal is immersed and corroded into the best aluminum immersion solution. And then collect the best aluminum dipping solution, adjust with hydrochloric acid Adjust the pH to 7, under this pH condition, 100% aluminum precipitation recovery can be achieved. After filtration, "aluminum hydroxide" products can be obtained for industrial use.

The gold and titanium filter residue obtained by aluminum immersion and dissolution and then filtration will continue to be impregnated and dissolved by titanium, with 5N~6N nitric acid impregnant, solid-to-liquid ratio 0.5g/50ml (immersion sample 0.5g immersion volume 50ml), 60 It is immersed for 3~5 hours at ~80℃, and 100% of the titanium metal in the filter residue containing gold and titanium can be immersed in the best titanium immersion solution for corrosion. After that, collect the best titanium impregnation solution, adjust the pH to 7 with sodium hydroxide, and recover the titanium that can be achieved under this pH condition. After filtration, the "titanium hydroxide" product can be obtained for industrial use. By impregnating and dissolving titanium metal, 100% of the titanium metal in the product containing gold and titanium filter residue is removed, and finally a high-purity "gold" product can be obtained.

The present invention relates to a "recycling method for sputtering derived resources containing gold, titanium, and aluminum", and the structure and manufacturing process of each of its embodiments have not been seen in books or publicly used, and sincerely meets the requirements of a patent application. , Granting the patent as soon as possible, I am very grateful; For those who need to be clarified, the above are the specific embodiments of this case and the technical principles used. If the changes made according to the concept of this case, the resulting functional effects still do not exceed the spirit covered by the specification and drawings, All should be combined with Chen Ming within the scope of this case.

A: Recovery method of sputtering derived resources containing gold, titanium and aluminum

a, b, c, d: steps

Claims (1)

A method for recovering resources derived from gold-titanium-aluminum sputtering includes: a step of recovering aluminum, in which a resource is first subjected to a crushing treatment, then placed in 20~30℃, concentration 5N~6N, impregnated solid liquid The ratio condition is set to 3g/100ml sodium hydroxide impregnant, and after immersing for 15-25 minutes, filtering to obtain an aluminum-containing impregnating solution and a gold and titanium-containing filter residue, and then the aluminum-containing impregnating solution is adjusted by pH After precipitation, the recovered aluminum hydroxide is obtained; the aforementioned pH adjustment precipitation method is to adjust the acid-base value of the aluminum-containing impregnation solution to pH 7 with a hydrochloric acid solution; a gold recovery step is to put the aforementioned gold and titanium filter residue into 60 ~80℃, concentration of 5N~6N, immersion in a nitric acid impregnant with a solid-to-liquid ratio of 1g/100ml, and immerse for 3~5 hours, then filter to obtain high-purity gold recovery and a titanium-containing impregnating solution; and The step of recovering titanium involves pH adjustment and precipitation of the titanium-containing impregnation solution, wherein the pH adjustment precipitation method is to adjust the acid-base value of the titanium-containing impregnation solution to pH 7 with sodium hydroxide solution to obtain titanium hydroxide recovery Things.

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